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Getting started with arduino: what to buy

98karlh
98karlh over 7 years ago

Hello e14

 

Environmental engineer from denmark checking in.

I am building a project in which I plan to use an arduino to measure and log/record sensor data.
This sensor data includes: temperature, pH, conductivity, gas/liquid flow, and light intensity (x2 sensors), all measured in an aquatic environment.

Initially I will set up and test each sensor individually, then later set up a full set of sensors, and finally I require up to 6 sets of the above mentioned sensors.

 

I have tinkered with professional lab equipment, but starting up for myself, my budget is a far cry from what is required.

 

so the tasks at hand are:

 

1: aquire the nessecery parts

2: get familiar with building and programming arduino

3: set up data logging

4: test each sensor

5: set up a full set of sensors

6: set up multiple paralel sets of sensors using preferably 1 arduino(?), otherwise multiple.

 

I would love your thoughts on step 1: aquiring the nessecery parts.

(max budget ca. 200$, preferably around 100 if possible)

 

-Purchase an all-around starter kit for arduino to first learn the basics, and then the additional parts needed in order to reach my end-goals?

-Genuine arduino vs. 'clones' ?

 

also ideas, questions and inputs are absolutely welcome!

 

With kind regards

-Karl

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  • shabaz
    shabaz over 7 years ago +4 suggested
    Hi Karl, You might also want to examine (to rule in or rule out) the Raspberry Pi, because if you wish to perform logging, then there are more options with it (micro SD card with file system, USB storage…
  • ntewinkel
    ntewinkel over 7 years ago in reply to shabaz +3 suggested
    > Arduino could be cheaper perhaps It is, especially if you start out with an inexpensive clone. However, after the FTDI incident, some clones now use a different USB-to-Serial chip which requires special…
  • beacon_dave
    beacon_dave over 7 years ago +2 suggested
    Perhaps take a look at these resources: Jeremy Blum Arduino Tutorials (here on Element 14) There is also a published book which covers similar ground. http://www.exploringarduino.com/ (Tutorial 11 covers…
  • shabaz
    0 shabaz over 7 years ago

    Hi Karl,

     

    You might also want to examine (to rule in or rule out) the Raspberry Pi, because if you wish to perform logging, then there are more options with it (micro SD card with file system, USB storage, network storage, cloud based storage, and all with timestamping). Lots of basic sensors are very cheap (provided you're not looking for something already calibrated) so your $100-$200 budget will go far. You might rule out the Pi if (say) you need to run on very low power for extended periods for instance. But if you're happy to tether to a mains adapter supply then the Pi could be a good option, it really depends on what you wish to do.

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  • 98karlh
    0 98karlh over 7 years ago in reply to shabaz

    Outstanding, I will look in to it emidiately!

     

    My initial reason for selecting arduino was the posibility for using both analog and digital signals from sensors (without use of ADC), as well as the lower cost of an arduino.

     

    It was my understanding that logging with the arduino was relatively simple, if using e.g. the connectivity shield, where data can be transferred via network, or using the build in(?) micro sd slot. (this was my original plan)

     

    If all of this is a success, I may end up needing multiple of these sensor logger kits, and so unit cost is also a concern.

     

    but if rasberry pi Is a better option, then the cost difference may be negligible =)

     

    Reading up on Pi now, as I said, I am a bit out of my comfort zone, and while it is exiting for me, I hope you will bear with me for being a bit slow image

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  • beacon_dave
    0 beacon_dave over 7 years ago

    Perhaps take a look at these resources:

    Jeremy Blum Arduino Tutorials (here on Element 14)

    There is also a published book which covers similar ground.

    http://www.exploringarduino.com/

    (Tutorial 11 covers SD cards and datalogging)

     

    Tom Igoe's "Making Things Talk: Using Sensors, Networks, and Arduino to See, Hear, and Feel Your World"

    https://www.amazon.co.uk/dp/1680452150/ref=sr_ob_6

    (new edition just about to be published)

     

    TinkerCAD circuits (formerly circuits.io)

    https://www.tinkercad.com/circuits

    Virtual breadboarding with Arduino emulation.

     

    Adafruit data logger shield tutorial

    https://learn.adafruit.com/adafruit-data-logger-shield/installing-the-headers?view=all

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  • 98karlh
    0 98karlh over 7 years ago in reply to beacon_dave

    Thank you!

    I am looking through your suggestions now, will get back to you later =)

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  • shabaz
    0 shabaz over 7 years ago in reply to 98karlh

    Hi Karl,

     

    The ADC on the Arduino is of fairly low res (10 bits) so although useful, you might prefer using digital output sensors anyway. Both approaches (Arduino/Pi) will have a learning curve, for software and hardware, and you may need to follow some tutorials to get the practice of coding for them. Pi has a few more options around choice of programming languages, Arduino could be cheaper perhaps. Hard to say which is preferable!

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  • beacon_dave
    0 beacon_dave over 7 years ago in reply to shabaz

    The SAMD21 based Arduinos appear to have 12-bit ADC if needed.

    https://store.arduino.cc/usa/arduino-zero

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  • ntewinkel
    0 ntewinkel over 7 years ago in reply to shabaz

    >Arduino could be cheaper perhaps

    It is, especially if you start out with an inexpensive clone.

     

    However, after the FTDI incident, some clones now use a different USB-to-Serial chip which requires special setup. But it's not difficult once you know what drivers to look for.

     

    Arduinos and their clones also come in several smaller form factors at inexpensive pricing. Like the Nano and the Pro-Mini.

     

    A couple of other things I've found is that Arduino is quicker and easier to set up, and they start up a lot faster. Raspberry Pi startup is similar to booting up an older PC.

     

    If you want Arduino IDE, wireless and Internet-based logging (via Particle.io), the Digistump Oaks are tiny and only about $11. They are programmed the exact same way as Arduino (same IDE) and have built-in WiFi and run fast at 80MHz. They only have one single analog-in and I think it's 10 bit (similar to Arduino). They're based on the ESP8266 chips. I bought one from their Kickstarter and barely used it so far, but it's kind of a neat and easy system. That was during the rough stages, so it should be even nicer now. Plus as long as the Oak is in wireless range you can update it without having to plug it into your computer. So a backyard sensor could be updated without having to go get it.

     

    In your case, I would suggest starting out with an Arduino Uno (or clone), do some tutorials (like Oomlout ARDX), and then start your project on that. The Arduino Uno is still the most supported setup, which will make it easier to find examples and help when starting out.

     

    Cheers,

    -Nico

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  • 14rhb
    0 14rhb over 7 years ago

    Karl,

     

    I recently reviewed one of the Arduino Starter Kits on E14. I thought the kit was a great introduction to those wishing to know what the Arduino was and what it could do.

     

    You sound like you already know what you would like to build and perhaps it would be better for you to purchase a separate Arduino Uno, USB lead, breadboard, and the 'shields' required for your sensors (shields are PCBs that stack up on the Arduino using pins and sockets). You will find plenty of online resources (including Element 14's Arduino group) that will get your sensors up and running quickly.

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  • 98karlh
    0 98karlh over 7 years ago in reply to beacon_dave

    The tutorials look great, I will try them out!

    Especially the SPI, I2C, analogue input and the sd-card read/write tutorials seem super usefull to my goal =)

     

    I will check out the virtual breadboarding in advance of ordering and recieving my goods!, cant wait.

     

    Also the datalogger shield is a really nice option to have!

     

    I will start with youtube videos, the included tutorial (if I get a starter kit containing one), and other free/included introductions, to start with.. If it turns out I want more, I will be sure to check out the books you mention =)

     

    Thank you so much for the input, it is appreciated.

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  • 98karlh
    0 98karlh over 7 years ago in reply to shabaz

    Based on the feedback here, adn some additional reading, I think I will go with arduino. It seems the most accessible to me at this point, and the prospect of it being cheaper (especially when I get to the point of building my own stuff instead of going with pre-build boads), is nice.

     

    I will keep in min the low resolution of the build in ADC of the arduino. It is my understanding that using the digital I/O, I can make use of higher resolution ADCs and in that way still make use of analogue sensors ?

     

    It will definately be a learning curve, but I am greatly looking forward to that =)
    and I will be checking out a lot of tutorials, while hopefully still experimenting som on my own =)

     

     

    Thank you for your inputs!

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